BLETHYN, WILLIAM (d. 1590), bishop of Llandaff, was born in Wales, and educated at Oxford, at either New Inn Hall or Broadgates Hall (now Pembroke College). Having taken orders he became archdeacon of Brecknock, and in 1676 bishop of Llandaff, holding at the same time several livings in order to add to the scanty endowments of the see. He died in October 1590, leaving three sons, and was buried in the church of Mathern, Monmouthshire, where was his episcopal residence.